Harrow grinder



p H. F. HANSON HARROW GRINDER Filed Anvil 26, 1924 2 Sheets-Sheet 1 H. F. HANSON HARROW GRINDER Spt. 13,1927. ,583

Filed Anril 26, 1924 2 Sheets-Sheet 2 j a v 4 Patented Sept. 13, 1927.

PATENT when. 7,

HNSiF. HANSON,1OF 'mwoon, IOW-A.

-\.HAB.RQW e eee W i-12 This invention relates a grinder for ITLheQoB'eQt ofthe invention is. to ,provide I ithin ithe sf' o e f Wha is cla d With- M eil -f outifdeparting ro nthe' spirit of 1 'the inven tion' I k @In theaceolnpanying drawings Figure r pr sen 1 j iide e t on Q e grinder ,qm struete'din aceo rdanee With this ntion with .Ia', gang o "bar w di k sho vnfinj,position i r grinding;

,Fig. 21' epip e lvie thereof;

.Fig- 4 :i a d taile "i l ti ont sec o k nn hem & Q 'fFi -"l'; r

Fig/5 is' a detail side elevation with parts ke o and; in s eet on;

LF 61 a e p if t ve Vie ne of the bearings for the gang disk and j Fig. '7 ,is a 'detailhorizo ital .seotion. In the .enibodinient"illustrated [a support inglfraine 1 is showngeoniposed of -1e1 1git h carryin'ghthe jarin"26 is equipped with a lever '29 hi'eh has a s1'3'ring pressed dog 30 engage a toothed segment 31 secured to the outer face of sidebar 2*by lneans'of vhich thelever I are locked in adjusted po-' dina'lly,extendingside bars 2 and Connected by lend bar's 4 and 1 15 This frame" shown s pp ed by f e qe e i vth corners thereof preferablydorn e'd of --m ta1 and ,having outturned feet 7' which .be

boltedfor otherwise secured to a base.

The side and end barsare preferably con- ;The beveled gear ll "meshes with a bevstruotedi of -ehennel iron and i another end GRINDER.

1924. v Serial No. 709,233.

journaled in a suitablebearing carried by astandard 14L Thisshaft 13 isprovided at its outer end beyond the standard 14 lyvith a pulley 151which is conneoted by a belt '16 with another pulley 17 loose on" a shaft 18 Which extends transversely of'the framel about midway the length .thereof.. The pul-.

leyf 17 has a elutoh member 19 on its outer face des gned tojengage with a compleeo a nientary oluteh member 19 'earried bythe inner face of a-jdrivin' wheel or pulley 20 which is keyed to sha t 18and adapted to be Connected with l any suitable source of power." f-

;The' pulleyl? has a peripherally grooved hub'iextension 216011 ts .mneriacewith which is designed to be engaged the hooked endf 22i olf a rod 123, the other end ,of which is mounted to swinglaterally in a keeper 24,011 theouter face'of side bar 3; A cam 25 ;is carried bythe rod 23 in the path of an arm 26 whichprojeots at right angles from one end ofa shaft 27 journaled to turnin suitable bearings carried by the sidebars 2 and 3 of the [frame and whioh is designed "fqra,purposepresently to-bedeseribed. A spring 28 is secured to theouter'fa'ce of the nside bar- 8 and exerts itstension against rod 23 to normally force the 'rod outward toge tl1erWitli the pulley '17 with which it is engaged and thereby hold the clutch meni- "bers""19' and 19 "interlockingly engaged. This spring also operatesto move this pulley outward after' the arm 26 ,has been-released from the cam 25 as villbehereinafter more lfully deseribe'd.

Thejendof'shaft 2T opposite to theend carried thereby designed to jsition;

An arm '32 isa fi ged'to shaft I271a-I d pro- 'jects laterally therefrom ;having loosely The lower end of the lever' 34 has arod 35 extended transversely v therethrough V and adapted to" sl ide" t1ierein. This" rod 35 has an eye 86'at one end and &nut '37 adjustably mounted Loni ts' othe end. can spring ,38 on the rod bet veenthe nut 37 n r m) and the lever ill and the tension thereof may be varied by adjusting the nut 37. Another coil spring 39 is connected at one end with the eye 3(3 of rod and atits other end attached to shaft 527 preferably by means of a clip A0. A stub shaft ll projects laterally inward from the upper end of lever 3st and fixedly mounted in said lever. A grinding, wheel is loosely mounted on the stub shalt -l-1 and has a pinion l3 fixed to one face thereof This pinion l3 meshes with a gear ll fixedly secured to the shaft 18 so that when said shaft 18 is rotated the grinding wheel 42 will be correspondingly turned.

The lever ti-Ll being loosely mounted on the shaft 18 may be actuated by the lever 29 for *aryii'ig the position of the grinding wheel relative to the disks to be sharpened as will be hereinafter more fully described.

Journaled in the side bars 2 and 3 in advance of shaft 18 is a shat't 4:5 having a crank handle- 6 at one end thereof for turning the shaft. Cables l7 and 48 are secured at one end to the shaft -l-5 and wound in opposite directions thereon, the cable ill extending for ardly and trained over a pulley 1-8 mounted on a shat't l9 secured in the side bars and 3. The other end of the cable l-T is connected with an eye bolt 50 which is adjustably mounted in a bracket 51 carried by a sliding frame 60.

The cable l8 extends rearwardly and trained around a pulley 5E2 loosely mounted on a. rod or shaft 58 journaled in the rear ends of the side bars 2 and This cable l8 utter extending around pulley 52 is connected with an eyebolt carried by a bracket 55 on the sliding frame at the side of the machine opposite to that on which the (we bolt 50 mounted.

The sliding :lrame 60 comprises two side men'ibers 61 and 62 mounted to slide longitudinally on the side bars and 3. These members (ill and G2 are connected by longitudiually spaced transversely extending cross bars 63 and 6-1: which carry bearings (35 and ($6 to support the disk gang to be sharpened.

The shaft supporting gearings (55 and (56 are exactly alike and hence one only will be described in detail]. Each bearing comprises two laterally spaced standards 67 and (58 between which are mounted upper and lower bearing blocks 69 and 70. the block 70 being fixed and block 69 removable and held in place by a bolt 71 extending through apertures 72 in the standards (57 and 68 as is shown clearly in Fig. 6.

These bearings (35 and (36 are designed to support the shank or shaft whiclfcamies the harrow disks 101 to he sharpened, it being understood that in order to insert: or remove the shaft 100 the upper bearing blocks 69 are removed, the shaft 100 positioned in the lower block 70 and then blocks of) are inserted between the standzlrds 67 and ill and secured by the bolts Tl. ll hcn so positioned the disks IlOl are ready to be ground. by the wheel .1-2 it being understood that the covered faces of the disks are sharpened at their peripheries. The disk gang being thus mounted in the sliding frame (it) said frame may be moved :lorward or backward by turning sha'tt 4-5. When the shaft 4-5 is turned in one direction the cable 4:7 will be wound up thereon and cable 418 unwound thus exerting a pull on the "frame (it) which will move it forward to properly position the disk to be ground in relation to the wheel l2. ll hen the shaft; is turned in the o iiposite direction cable 48 will be wound up thereon. and cable l-T unwound thereby ex rting a rearward pull on frame (it) to position the gang; shaft 100 in the desired relation to the grinder.

i l rod 7? is slidahly mounted in the extension hub 10 ot the bevel gear 1]., said rod being polygonal in cross section and the hub correspoi'uliugly shaped to receive it so that the rod may slide longitudinally in the hub and held to turn with it so that the rotation of gear 11 will operate to turn red "1'3. A. pair of clai'n1 iing jaws T l; and T5 are *arried by the inner end of rod 73 and are designed to be engaged with a nut 102 carried by the front end of shaft; 100 so that said nut, the sha'tt 100 and the disks carried thereby will rotate with the rod 72- and will more lonritiulinally therewith which longitudinal movement occurs when the frame 60 is reciprocated.

In the operation of this machine the parts being: in the position shown in Figs. 1 and 2 when power is applied to pulley 20 the shaft 18 will. be rotated thereby turning the grinding: wheel which has first been properly positioned in relation to the disk to be sharpened by adjusting: the lever 29 and locking it engaged with the rack 31. Power is trans mitted :t'rom pulley ll through bolt 10 to the pulley 15 the rotation of which operates to turn the stub shalt l3 and through the internieshing gears 11. and 1) turns rod 73 and also the shaft 100 connected therewith. The beveled gear 12 being: made much smaller than gear 11 a slow rotary movement will be imparted to shalt 100 so that the disk 101 will be slowly turned to permit the grinding wheel 42 to properly operate for grinding the disks.

When it desired to shift the frame 60 to position a new disk to be ground the lever 29 is disengaged troni rack 31. and the shaft 2? turned forwardly which causes the rank arin it) on said shaft to ride over the cam 25 thereby forcing the rod 23 inward against the tension or spring and separating the clutch members 19 and 19". This turning; of. shaft 27 will also lower the grinding wheel tin i out o'fthe path of the disks 101, This sepasaid arm and having a pinion fixed to one into engagement.

ration ofthe clutch members throws out the gears 11 and 12 and thereby stops the" rotation of the disk gang. When the parts are in this position the gang may beremoved and another substituted and the sliding frame reciprocated by turning shaft 45 in the desired direction.

hen motion is to'be imparted to the gang disk the lever 29 is disengaged from the rack 31 and turned rearwardly to move the arm 26 out of engagement with the cam 25 and the spring 28 will then exert its tension against rod 23 to force the clutch members When the lever 29 is released from rack 31 the spring 39 will contract and turn shaft 27 to disengage arm 26 from cam 25.

I claim:

1. In a disk grinding machine, a supporting frame, a grinding wheel mounted for swinging movement in said frame, means for locking said wheel in adjusted position, a disk gang supporting frame mounted to slide on said supporting frame in the path of said wheel to position the disks in contact with said wheel, and means for locking said wheel engaged with said disks,

2. In an apparatus of the class described a supporting frame, a disk gang support mounted to reciprocate on said frame longitudinally thereof, a shaft journaled in said frame and extending transversely thereof, a gear wheel fixed to said shaft, a lever fulcrumed intermediate its ends on'said shaft with'an arm extending laterally over said gear, a grinding disk loosely mounted on said arm and having a pinion meshing with said gear whereby the turning of the gear rotates the wheel, means connected with said lever for raising and lowering the grinding wheel to position it in relation to the disks. to be ground and resilient means to turn said lever to normal position whenrelease'd.

3. In an apparatus of the class described, a supporting frame, a disk gang support mounted to reciprocate longitudinally on said frame, a transversely extending shaft journaled in said frame, a gear wheel fixed to said shaft, a lever fulcrumed intermediate its ends on said shaft and having alaterally extending arm at one end overlying said gear, a grindingwheel loosely mounted on face thereof and meshing with SLld gear whereby the turning of the gear rotates said wheel, another'shaft mounted transversely in said supporting-frame and spaced longitudinally from said first mentioned shaft, a link and lever connection between said; last mentioned shaft, andthe upper end of said lever, a coiled spring connecting the lower end of said lever with said last mentioned shaft and means for, turning said last mentioned shaft to swing said lever into horizontal position" against the tension "of. said spring for lowering the gr nding wheel to provide for the adjustment of the disk gang 5 relatively thereto.

4.111 a disk grinding'inachine, a support-- ing. frame, a grindingwheel mounted for swinging movement in said frame, means for adjusting and locking saidwheel in adjusted position, a disk gang supporting frame mounted to reciprocate on said supporting frame to position the disks in the path of the grinding wheel, and. a rotary member connected with said gang supporting frame whereby the turning of said member in one direction will move the frame in one -direction and the reverse movement of said member Wlll move the frame in the other direction. A

5. In a disk grinding machine, a supporting frame, a transverse shaft mounted to rotate in said frame, a grinding disk connected to be rotated by said shaft, a disk gang support mounted on said frame, a rod rotatably mounted on said frame and having means for engaging a disk gang for rotating it, a pulley loosely mounted on said shaft and carrying a clutch element, a driving wheel fixed to said shaft and having a clutch element to cooperate with the pulley carried element for connecting the pulley with the shaft to adapt it to be rotated thereby, means connecting said pulley to rotate said rod, and means for sliding the pulley on the shaft to release the clutch and throw out the rod actuating means.

6. In a disk grinding machine, a supportingfframe, a transverse shaft mounted to rotate in said frame with one end extending beyond the frame, a drive pulley fixed to said end and having a clutch member on its inner face, a pulley loosely mounted on said end and having a clutch member for engagement with 'the first mentioned clutch member, a grooved extension hub on the inner face of said second mentioned pulley, a rod having one end engaged with said grooved hub extension and its other end p'ivotally mounted onsaid frame to permit the rod to swing laterally, a cam carried by said rod, a

grinding wheel carried by said shaft, a disk support mounted on said frame, a pulley connected to actuate the disks carried by said disk support, a band connecting said second mentloned pulley with said last mentioned pulley, and oscillatable means operable to engage said cam and swing said rod.

inwardly to release the clutch members and throw out the disk rotating means.

7. A disk grinding machine including a supporting frame, a transverse shaft-rotatable therein, a lever fulcrumed intermediate its ends on said shaft and having a grinding disk carried by one end, another shaft mounted transversely in said frame and having means for rotating it, a connection between said shaft and lever whereby the twining of the shaft will swing the lever to raise or lower the grinding disk, a clutch carrying pulley loosely mounted on said first mentioned shaft, :1- rod connected at one end with said pulley and pivoted at its other end to said frame, a. spring normally forcing said rod outward, a cam on said rod, an arm carried by said second mentioned shaft to engage said eani when the shaft is turned in one direction to more said rod upward againstthe tension of its spring, and means to return said arm to initial position when the shaft is released.

In testimony that I claim the foregoing as my own I have hereto ailixed my signature.

HANS F. HANSON. 

